The DX-DD may be installed as an inverted vee, flat top dipole, sloping dipole, etc. The inverted vee configuration seems to be the easiest for most amateurs to utilize. It has several benefits, such as requiring but a single central support structure for the DX-DD center insulator.
Remember, though, the ALPHA DELTA DX-DD was designed for compromise installations where there are space limitations. A little thought will allow the DX-DD to be installed in spaces normally thought to be too small for an antenna for these frequency bands!Tower mounting height for the DX-DD will require some form of "standoff" for support of the DX-DD center insulator. A spacing of 18 or more away from the tower will rove adequate. Mounting height for the DX-DD is not overly critical.
However, as with most half-wave antennas, the higher and in the clear, the better. Let the space you have available dictate the mounting height and scheme of installation. The introduction of your DX-DD into a tower system employing multiple guy wires or other wire antennas may cause detuning of the DX-DD antenna.
This may be evidenced by a shift in the resonant frequency or increase in the minimum VSWR of the antenna. Try to keep the DX-DD as "in the clear" as possible.
Installing the DX-DD so that it is in a different plane than guy wires will help, as will "breaking" the guy wires with strain insulators. For some installations, it may be necessary to employ the use of an antenna tuner to overcome this detuning situation.
The DX-DD utilizes the exclusive ALPHA DELTA ISO-RES coil principle for shortening and multibanding an antenna. The ISO-RES is not a trap, due to the fact that there isnt a trap capacitor being used.
Thus, the DX-DD is a much lower "Q" antenna than one that would be constructed using true traps! This allows the DX-DD to be broader in bandwidth than is possible with a trap-type antenna of equal size. The lower "Q" also allows the user to employ a moderate range antenna tuner (matchbox) for achieving resonance and min. SWR anywhere within the covered frequency bands. NOTE: Some automatic antenna tuners in transceivers do not have the impedance range to tune the Model DX-DD on bands other than the covered ranges.
An external wide range tuner may be required. GigaParts ships from multiple locations across the USA, so a portion of your order may come from two different warehouses. Modified radios do not qualify for direct replacement unless GigaParts performed the modification.Is a full service computer and amateur radio store. Our PC department stocks the latest components for upgrading your PC, building your own PC, or having us build one for you. Our Radio department features the latest products from manufacturers such as Alinco, Icom, Kenwood®, Yaesu, MFJ, Diamond, and many more. Whether you're a DX'er looking for the latest HF rig or a soon-to-be-HAM looking for study materials and a two-meter handie talkie, we have what you need! We look forward to adding you to our long list of satisfied customers. You may also be interested in.. The item "ALPHA DELTA DX-DD No Trap 80 and 40 Meter Dipole or Inverted V Antenna" is in sale since Monday, April 15, 2019. This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas". The seller is "gigaparts" and is located in United States. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.